TCN75_13 Datasheet, PDF (11/20 Pages) Microchip Technology – 2-Wire Serial Temperature Sensor and Thermal Monitor

TCN75
TABLE 5-3: TEMPERATURE (TEMP) REGISTER, 16 BITS, READ ONLY
The binary value in this register represents ambient temperature following a conversion cycle.
D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8] D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]
MSB D7 D6 D5 D4 D3 D2 D1 LSB X
X
XXX
XX
TABLE 5-4: TEMPERATURE SET POINT (T_SET) REGISTER, 16 BITS, READ/WRITE
D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8] D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]
MSB D7 D6 D5 D4 D3 D2 D1 LSB X
X
XXX
XX
TABLE 5-5: HYSTERESIS (T_HYST) REGISTER, 16 BITS, READ/WRITE
D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8] D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]
MSB D7 D6 D5 D4 D3 D2 D1 LSB X
X
XXX
XX
In the TEMP, T_SET, and T_HYST registers, each unit
value represents one-half degree (Celsius). The value
is in 2’s – complement binary format such that a read-
ing of 000000000b corresponds to 0°C. Examples of
this temperature to binary value relationship are shown
in Table 5-6.
TABLE 5-6: TEMPERATURE TO DIGITAL
VALUE CONVERSION
Temperature Binary Value
HEX Value
+125°C
0 11111010
0FA
+25°C
0 00110010
032
+0.5°C
0 00000001
001
0°C
0 00000000
00
0.5°C
1 11111111
1FF
-25°C
1 11001110
1CE
-40°C
1 10110000
1B0
-55°C
1 10010010
192
TABLE 5-7:
Name
TEMP
TSET
T_HYST
POINT
CONFIG
TCN75’S REGISTER SET SUMMARY
Description
Width Read
Ambient Temperature
16
X
Temperature Setpoint
16
X
Temperature Hysteresis
16
X
Register Pointer
8
X
Configuration Register
8
X
Write
X
X
X
X
Notes
2’s Complement Format
2’s Complement Format
2’s Complement Format
 2001-2012 Microchip Technology Inc.
DS21490D-page 11